A 10 kg mass is stationary in the position shown. Each of the three springs are relaxed. Each spring has a characteristic stiffness constant, k, as shown on the diagram. If the mass is now displaced 20 mm to the right, what will be the net force, in newtons, exerted by the three springs on the mass? Ignore gravity.

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​ F s ​ = k eq ​ × ( 20 ) × 1 0 − 3 F s ​ = 250 × 20 × 1 0 − 3 F s ​ = 5000 × 1 0 − 3 = 5 N ​

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